use one's head

Think, have common sense, as in Use your head, Martin. No one's coming out in this weather. This idiom uses head in the sense of "brain" or "intellect," a usage dating from the late 1300s.

Common Names:

Name	Pronounced	Usage
Adolphus	-	Ancient Germanic (Latinized)
Mirela	-	Romanian, Croatian
Daud	-	Indonesian, Arabic
Chibuike	-	Western African, Igbo
Marigold	MER-ə-gold, MAR-ə-gold	English (Rare)
Ayyub	-	Arabic